Befkigekating apparatus



l.. G. COPEMAN REFRIGERATING APPARATUS Filed July 8, 1922 @Hanley Patented `lilly 3l, i923.

nir* eras LLOYD G. COPEMAN, OF ISLINT,` MICHIGAN, ASSIGNOR TO FLINT, MICHIGAN.

' EQBQ PTT yai.

EDWIN W. A'rwoo'n or' RFRIGERATI-NG .APPARA'JJUS.V Y.

useful Improvements in Refrigerating Apparatus, of which the following is a specification.

This invention relates to refrigeration and has for its object refrigerating apparatus arranged to maintain a substantially uniform temperature' and which eliminates the necessity of a thermostat'and a motor for operating the valve that controls the flow of cold water through the box.

In a number of my) prior applications and patents, notably in atent No. 1,409,283 i's-. sued on the 4th day ofMarch, 1922, I have described vand claimed a system of refrigeration using a pressure controlled pumpl which is connected with a refrigerating api paratus, provided with a thermostat that opens and closes a valve in the water line by the use of an electric motor. This con` struction is very satisfactory impractice, but obviously the thermostat and motor are relatively expensive elements in the apparatus. j f

It is the object of the present invention to get substantially similar results by eliminatlng-the thermostat and substitute in placetherefor a bleeder pipe connected with the water storage tank.

The ligure is an elevation of the apparatus, somewhat diagrammatically shown.

pump L is operated by electric motor M which drives the-ily wheel b. This motor has a pressure-regulated switch c in the electric circuit which furnishes current to the armature and the field'. The operation of a pressure controlled switch of this kind is' well understood as it is described in detail and shown in detail in my prior` Patent No. 1,409,283. Suffice ,it to say here that when the pressure in the water line al yfalls below a given point, this closes the circuit, excites the motor and the pump continues to pump e1 until enough water has been introduced into the storage tank e to compress the air head and raise the pressure to 'a given point, say 70 pounds. A water pumping system of this kind is quite a common thing now in rural communities. The water is usually taken from a deep well where thewater is cold the year around, so it can be advanta- 1922. serial No. 573,6oi.

geously applied for extracting heat from a refrigeratlng box j". To this end, the water line main d supplies water to -this box f and the coils g, the water being distributed through the upper header i1. to the lower header i.

It will be unnecessary for me to describe in detail the specific pipe construction. Ar-

rangements for the distribution of the w'ater through the wallsof the box such as this has been amply described in a number of' my prior applications and Patent No.l

1,409,283. part of the present invention.

' In all my prior structures, it has been customary to employ a waste pipe leading from lthe lower header and a thermostat-v ically'controlled motor andvalve serve to` open a way through this pipe to discharge what I have preferably called waste water. This discharge is effected when the temperature inthe food chamber rises above a given point. It is the purpose of the present invention to do away with the necessity of the thermostat except where extremely accurate and uniform temperatures are desiredin the box. v

l effect this object by placing a bleeder pipe j in the storage tank as' and provider a valve la therein in connection with graduations m to indicate the amount of opening. By bleeding this tank with a very small stream/of water, this will insure the pressure in the tank being periodically rey duced to a pointfwhich will draw a new supply of cold water into the refrigerating coils at stated times. certain temperatures will be readily learned by the operator of. the apparatus or they may be stated 'in an instructionpamphlet, so that the operator will know that 'in weather of'an average, say of 60 degrees of temperature that the tank should be bled at a certain rate to achieve certain desired results inthe box. By this bleeding operation it is possible to get a large quantity of fresh, cold water' at vided the bleeding operation takes place at a point of thelin'e where the liney is reduced.

The specific arrangement is no The requirements of a stated period, pro-y pressure in the In the ligure shown I have shown an exthis will be suitable for bleeding to make my system work satisfactorily. Where the storage tank has a relatively large .capacity anto operate at comparatively frequent intervals without an unduly wasteful rate of bleeding. i

What I claim is:

1. In refrigerating apparatus, the combination of-al chamber to be cooled, a water line passing in heat-exchanging adjacency to said chamber, a pressure-controlled pump for supplying water to the water line, astorage tank, supplied with Water from that portion of the water line that passes in such adjacency to the chamber to be cooled,.andV

, means for bleeding water to relieve the pressure in the storage tank at stated periods to cause the pump to supply a new charge ofoold water to the portion of the water line in such adjacency with the coolingchamber.

`2. In a refrigerating apparatus, the combination of a chamber to be cooled, a water line provided with coils in heat exchanging relation with said chamber, a storage tank supplied with water by said water line after the water has passed through the vsaid coil, a

pressure-regulated vpump for supplying water'to the'water line, and a bleeding p1pe regulated by a Valve for bleeding water to lower the pressure in the Water tank so that Aat* stated periods the pump will be caused to supply a new charge of cold water tothe said coils. p t 3. In a'refrigerating apparatus, the comblnation of a chamber to be cooled, a water line having a portion in heat exchanging relation with said chamber to absorb heat therefrom, a pressure regulated pump for supplying water to said water line, and means for bleeding water t0 bring the pressure down to a point to operate the pump recaer@ at stated periods to supply a new charge of cold yWater to the water line adjacent to the cooling chamber.

4. In a refrigerating apparatus, the combi-l nation of a chamber'to be cooled, a water line passin in heat exchanging relation with said c amber to absorb heat therefrom, a pressure regulated pump for supplying cold water to said line, and acontrolled bleeding pipe for letting out avariant flow of Water in a continuous stream to reducethe pressure and periodically cause the pump to supply a new charge to that portion of the line adjacent to the food chamber.

5. In a refrigerating apparatus, the combination of a chamber to lbe cooled, a water line passin in heat exchanging relation with said c amber, a pressure-controlled pump for supplying cold water to said line, a storage ltank supplied with water from that portion of the water line that passes in adjacency with `the chamber to be cooled, an auxiliary storage tank connected with the Water line between the said storage tank and that portion of the water line that passes in ad- ]'acency with the chamber to be cooled, means vfor preventing the rst mentioned storage tank supplying the auxiliary tank with water, and means for bleeding water to relieve the pressure in the auxlliarystorage tank at stated periods and thereby causing the pump to supply new charges of cold water to that portion of the water line in adjacency with the chamber to be cooled.

6. In a refrigeratingapparatu's,the combination of a chamber'to be cooled, a water line rovided with coils in heat exchanging relation with said chamber, a pressure-con-r trolled pump for supplying water to said line, a relatively large storage` tank supplied with water passing through said coils, and

a smaller auxiliary storage tank between the L coils and the large storage tank, a check valve in the water linebetween the two storage tanks, and means forvbleeding `water to relieve the pressure into the auxiliary tank at stated periods to cause the pump to supply a new chargeof cold water to the coils at stated periods.

In testimonyI whereof I ailix my signature.

f LLOYD G. @UPEI/IAN. 

